使用asp.net通过gmail发送电子邮件

这里是一种使用asp.net通过gmail发送电子邮件，求使用Asp.net2.0中的System.Net.Mail类库实现此功能的代码（我写了个不知为什么就是不能发）

　　System.Web.Mail.MailMessage MyMail = new System.Web.Mail.MailMessage();
//1 代表使用 local smtp, 2 為外部 smtp
MyMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusing", 2);
//SMTP Server domain name
MyMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserver", "smtp.gmail.com");
//Server port, gmail use ssl smtp authentication, port number is 465
MyMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", 465);
//Authentication method, ssl or not, Username and password for the SMTP Server
MyMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", 1);
//cdoBasic 基本驗證
MyMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", true);
//帳號名稱 (Demo自行填入)
MyMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "XX@gmail.com");
//帳號密碼 (Demo自行填入)
MyMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "pwd");
MyMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendemailaddress", "XX@XX.XX");
MyMail.From = "XX@XX.XX";
MyMail.To = "XX@XX.XX";
MyMail.Subject = "ss";
MyMail.BodyFormat = System.Web.Mail.MailFormat.Text;
MyMail.Body = "ssss";
//SmtpMail.SmtpServer="smtp.gmail.com"; //指定SMTP另一寫法
System.Web.Mail.SmtpMail.Send(MyMail);

以下是Asp.net2.0写得，大家看一下有什么错误吗？

using System.Net.Mail;

MailAddress mAdr = new MailAddress("XX@XX.XX", "XXX", System.Text.Encoding.UTF8);
MailMessage mail = new MailMessage();
//mail.ReplyTo = mAdr;
//mail.Sender = mAdr;
mail.From = mAdr;
mail.To.Add("XX@XX.XX");
mail.SubjectEncoding = System.Text.Encoding.UTF8;
mail.Subject = "邮件主题";
mail.IsBodyHtml = true;
mail.BodyEncoding = System.Text.Encoding.UTF8;
mail.Body = "邮件正文";
mail.Priority = MailPriority.Normal;
SmtpClient smtp = new SmtpClient();
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.Host = "smtp.gmail.com";
smtp.Port = 465;
smtp.EnableSsl = true;
smtp.UseDefaultCredentials = false;
smtp.Credentials = new System.Net.NetworkCredential("XX@XX.XX", "pwd");
smtp.Timeout = 10;
smtp.Send(mail);

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近日看到一篇文章: http://www.codeproject.com/useritems/SendMailUsingGmailAccount.asp?print=true